Bitcoin diceware on a TI-89 graphing calculator

I wrote a program for the TI-89 graphing calculator to read die rolls from the user, convert them into a Bitcoin private key via base conversion, and derive the public Bitcoin address. Elliptic-curve point multiplication is dog slow on the TI-89's Motorola 68000 processor, but it's just math, so of course it still works. (The computation of the public key is shown in this video at 10x speed.)